#428DD3#428DD3

#428DD3 is a light, vivid cyan. Relative luminance 0.249; OKLCH L 62.8% C 0.130 H 249.3°. Best body text is #000000 at 5.98:1 contrast (WCAG AA passes).

Color values

HEX	#428DD3
RGB	rgb(66, 141, 211)
HSL	hsl(209, 62%, 54%)
HSV	hsv(209, 69%, 83%)
CMYK	cmyk(68.7%, 33.2%, 0%, 17.3%)
CIE-LAB	lab(56.99, -0.66, -42.72)
CIE-LCH	lch(56.99, 42.73, 269.11°)
OKLab	oklab(62.8% -0.0459 -0.1211)
OKLCH	oklch(62.8% 0.13 249.3)
XYZ	xyz(23.5251, 24.9086, 65.1834)
Luminance	0.2491 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#428DD3 #D38842

analogous

#42D3D1 #428DD3 #4244D3

triadic

#428DD3 #D3428D #8DD342

tetradic

#428DD3 #D142D3 #D38842 #44D342

square

#428DD3 #D142D3 #D38842 #44D342

split-complementary

#428DD3 #D34244 #D3D142

monochromatic

#1D4F7D #296EAF #428DD3 #74ABDF #A5C9EA

Accessibility & contrast

On white

3.51

#428DD3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.98

#428DD3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #428DD3

5.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##428DD3	#FFFFFF	#000000	##000000
##428DD3	1.00	3.51	5.98	5.98
#FFFFFF	3.51	1.00	21.00	21.00
#000000	5.98	21.00	1.00	1.00
##000000	5.98	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6E90D6

Deuteranopia (green-blind)

#5983D2

Tritanopia (blue-blind)

#009EA6

Achromatopsia (no color)

#898989

Design tokens & code

CSS

--color: #428dd3;
/* rgb */ color: rgb(66, 141, 211);
/* oklch */ color: oklch(62.8% 0.130 249.3);

Tailwind

colors: {
  custom: {
    50: '#86aee1',
    500: '#428dd3',
    950: '#000000',
  },
}

SCSS

$custom: #428dd3;
$custom-light: #86aee1;
$custom-dark: #000000;

JSON

{
  "hex": "#428dd3",
  "rgb": {
    "r": 66,
    "g": 141,
    "b": 211
  },
  "hsl": {
    "h": 208.966,
    "s": 62.232,
    "l": 54.314
  },
  "oklch": {
    "l": 0.62797,
    "c": 0.12951,
    "h": 249.3
  },
  "luminance": 0.24911
}

Semantic roles & 50–950 ramp

primary

#428DD3

secondary

#D7B79A

accent

#9142E5

background

#F8FAFD

surface

#F0F4FB

border

#CBCED4

text

#0C1015

muted

#7D7F83

Preview Lab

Preview with #428DD3

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →